linux-kernel - RE: [PATCH 4.4 29/57] RDMA/uverbs: Check port number supplied by user verbs cmds

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Message-ID: <32E1700B9017364D9B60AED9960492BC34341BF7@fmsmsx120.amr.corp.intel.com>
Date:   Mon, 17 Jul 2017 17:30:45 +0000
From:   "Marciniszyn, Mike" <mike.marciniszyn@...el.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Ismail, Mustafa" <mustafa.ismail@...el.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Yevgeny Kliteynik <kliteyn@...lanox.com>,
        Tziporet Koren <tziporet@...lanox.com>,
        Alex Polak <alexpo@...lanox.com>,
        Boris Pismenny <borisp@...lanox.com>,
        Leon Romanovsky <leon@...nel.org>,
        Doug Ledford <dledford@...hat.com>
Subject: RE: [PATCH 4.4 29/57] RDMA/uverbs: Check port number supplied by
 user verbs cmds

> Subject: Re: [PATCH 4.4 29/57] RDMA/uverbs: Check port number supplied
> by user verbs cmds
> 
> On Thu, Jul 13, 2017 at 03:54:28PM +0000, Ismail, Mustafa wrote:
> > > Subject: [PATCH 4.4 29/57] RDMA/uverbs: Check port number supplied
> by
> > > user verbs cmds
> > >
> > > 4.4-stable review patch.  If anyone has any objections, please let me
> know.
> >
> > Yes, this breaks modify qp.
> > See https://patchwork.kernel.org/patch/9830663/
> 
> I don't understand this response at all, sorry.
> 
> What should I do about this?  Is this patch alone a problem?  Is there
> some other patch I should apply that is in Linus's tree?  Where is the
> problem, only in this old release?
> 
> totally confused,
> 

This patch utterly breaks qib and hfi1 on at least 4.10.11 stable kernel.

I suspect and will soon verify that v4.13-rc1 is broke as well.

Mike